38211978 has 16 divisors (see below), whose sum is σ = 87341760. Its totient is φ = 10917696.

The previous prime is 38211977. The next prime is 38211991. The reversal of 38211978 is 87911283.

It is not an unprimeable number, because it can be changed into a prime (38211973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454863 + ... + 454946.

It is an arithmetic number, because the mean of its divisors is an integer number (5458860).

Almost surely, 2^38211978 is an apocalyptic number.

38211978 is an abundant number, since it is smaller than the sum of its proper divisors (49129782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38211978 is a wasteful number, since it uses less digits than its factorization.

38211978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909821.

The product of its digits is 24192, while the sum is 39.

The square root of 38211978 is about 6181.5837776415. The cubic root of 38211978 is about 336.8215264215.

The spelling of 38211978 in words is "thirty-eight million, two hundred eleven thousand, nine hundred seventy-eight".